casement window operator
A quick learner from Bloomfield Mi says:
July 13, 2011
the unit is mounted in the center of sill, and the window is hinged on the left from inside. The arm has a key that fit into the flat gear.
Mike from SWISCO responded:
July 14, 2011
Thank you for posting on the discussion board.
Take a look at the Swisco 39-175 Sash Crank Operator.